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m32r: fix tme_handler 

Fix pmd_bad check code of tme_handler (TLB Miss Exception handler).
The correct _KERNPG_TABLE value is not 0x263(=611) but 0x163.

Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
This commit is contained in:
Hirokazu Takata 2009-08-11 23:12:41 +09:00
parent 17d857be64
commit 2cff5e1a83
1 changed files with 8 additions and 4 deletions
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12
arch/m32r/mm/mmu.S
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@ -150,9 +150,13 @@ ENTRY(tme_handler)
; pmd = pmd_offset(pgd, address);
ld r3, @r3 ; r3: pmd data
ldi r2, #-4096
beqz r3, 3f ; pmd_none(*pmd) ?
and3 r2, r3, #0xfff
add3 r2, r2, #-355 ; _KERNPG_TABLE(=0x163)
bnez r2, 3f ; pmd_bad(*pmd) ?
ldi r2, #-4096
; pte = pte_offset(pmd, address);
and r2, r3 ; r2: pte base addr
srl3 r3, r0, #10
@ -263,9 +267,9 @@ ENTRY(tme_handler)
ld r1, @r3 ; r1: pmd
beqz r1, 3f ; pmd_none(*pmd) ?
;
and3 r1, r1, #0xeff
ldi r4, #611 ; _KERNPG_TABLE(=611)
bne r1, r4, 3f ; !pmd_bad(*pmd) ?
and3 r1, r1, #0x3ff
ldi r4, #0x163 ; _KERNPG_TABLE(=0x163)
bne r1, r4, 3f ; pmd_bad(*pmd) ?
.fillinsn
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